/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include "strv.h"
#include "util.h"
#include "log.h"
#include "build.h"
#include "pager.h"
#include "xml.h"
#include "path-util.h"
#include "sd-bus.h"
#include "bus-message.h"
#include "bus-internal.h"
#include "bus-util.h"
#include "bus-dump.h"
#include "bus-signature.h"
#include "bus-type.h"
#include "busctl-introspect.h"
static bool arg_no_pager = false;
static bool arg_legend = true;
static char *arg_address = NULL;
static bool arg_unique = false;
static bool arg_acquired = false;
static bool arg_activatable = false;
static bool arg_show_machine = false;
static char **arg_matches = NULL;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static char *arg_host = NULL;
static bool arg_user = false;
static size_t arg_snaplen = 4096;
static bool arg_list = false;
static bool arg_quiet = false;
static bool arg_verbose = false;
static bool arg_expect_reply = true;
static bool arg_auto_start = true;
static bool arg_allow_interactive_authorization = true;
static bool arg_augment_creds = true;
static usec_t arg_timeout = 0;
static void pager_open_if_enabled(void) {
/* Cache result before we open the pager */
if (arg_no_pager)
return;
pager_open(false);
}
#define NAME_IS_ACQUIRED INT_TO_PTR(1)
#define NAME_IS_ACTIVATABLE INT_TO_PTR(2)
static int list_bus_names(sd_bus *bus, char **argv) {
_cleanup_strv_free_ char **acquired = NULL, **activatable = NULL;
_cleanup_free_ char **merged = NULL;
_cleanup_hashmap_free_ Hashmap *names = NULL;
char **i;
int r;
size_t max_i = 0;
unsigned n = 0;
void *v;
char *k;
Iterator iterator;
assert(bus);
if (!arg_unique && !arg_acquired && !arg_activatable)
arg_unique = arg_acquired = arg_activatable = true;
r = sd_bus_list_names(bus, (arg_acquired || arg_unique) ? &acquired : NULL, arg_activatable ? &activatable : NULL);
if (r < 0) {
log_error("Failed to list names: %s", strerror(-r));
return r;
}
pager_open_if_enabled();
names = hashmap_new(&string_hash_ops);
if (!names)
return log_oom();
STRV_FOREACH(i, acquired) {
max_i = MAX(max_i, strlen(*i));
r = hashmap_put(names, *i, NAME_IS_ACQUIRED);
if (r < 0) {
log_error("Failed to add to hashmap: %s", strerror(-r));
return r;
}
}
STRV_FOREACH(i, activatable) {
max_i = MAX(max_i, strlen(*i));
r = hashmap_put(names, *i, NAME_IS_ACTIVATABLE);
if (r < 0 && r != -EEXIST) {
log_error("Failed to add to hashmap: %s", strerror(-r));
return r;
}
}
merged = new(char*, hashmap_size(names) + 1);
HASHMAP_FOREACH_KEY(v, k, names, iterator)
merged[n++] = k;
merged[n] = NULL;
strv_sort(merged);
if (arg_legend) {
printf("%-*s %*s %-*s %-*s %-*s %-*s %-*s %-*s",
(int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER", 13, "CONNECTION", 25, "UNIT", 10, "SESSION", 19, "DESCRIPTION");
if (arg_show_machine)
puts(" MACHINE");
else
putchar('\n');
}
STRV_FOREACH(i, merged) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
sd_id128_t mid;
if (hashmap_get(names, *i) == NAME_IS_ACTIVATABLE) {
/* Activatable */
printf("%-*s", (int) max_i, *i);
printf(" - - - (activatable) - - ");
if (arg_show_machine)
puts(" -");
else
putchar('\n');
continue;
}
if (!arg_unique && (*i)[0] == ':')
continue;
if (!arg_acquired && (*i)[0] != ':')
continue;
printf("%-*s", (int) max_i, *i);
r = sd_bus_get_name_creds(
bus, *i,
(arg_augment_creds ? SD_BUS_CREDS_AUGMENT : 0) |
SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_COMM|
SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_SESSION|
SD_BUS_CREDS_DESCRIPTION, &creds);
if (r >= 0) {
const char *unique, *session, *unit, *cn;
pid_t pid;
uid_t uid;
r = sd_bus_creds_get_pid(creds, &pid);
if (r >= 0) {
const char *comm = NULL;
sd_bus_creds_get_comm(creds, &comm);
printf(" %10lu %-15s", (unsigned long) pid, strna(comm));
} else
fputs(" - - ", stdout);
r = sd_bus_creds_get_uid(creds, &uid);
if (r >= 0) {
_cleanup_free_ char *u = NULL;
u = uid_to_name(uid);
if (!u)
return log_oom();
if (strlen(u) > 16)
u[16] = 0;
printf(" %-16s", u);
} else
fputs(" - ", stdout);
r = sd_bus_creds_get_unique_name(creds, &unique);
if (r >= 0)
printf(" %-13s", unique);
else
fputs(" - ", stdout);
r = sd_bus_creds_get_unit(creds, &unit);
if (r >= 0) {
_cleanup_free_ char *e;
e = ellipsize(unit, 25, 100);
if (!e)
return log_oom();
printf(" %-25s", e);
} else
fputs(" - ", stdout);
r = sd_bus_creds_get_session(creds, &session);
if (r >= 0)
printf(" %-10s", session);
else
fputs(" - ", stdout);
r = sd_bus_creds_get_description(creds, &cn);
if (r >= 0)
printf(" %-19s", cn);
else
fputs(" - ", stdout);
} else
printf(" - - - - - - - ");
if (arg_show_machine) {
r = sd_bus_get_name_machine_id(bus, *i, &mid);
if (r >= 0) {
char m[SD_ID128_STRING_MAX];
printf(" %s\n", sd_id128_to_string(mid, m));
} else
puts(" -");
} else
putchar('\n');
}
return 0;
}
static void print_subtree(const char *prefix, const char *path, char **l) {
const char *vertical, *space;
char **n;
/* We assume the list is sorted. Let's first skip over the
* entry we are looking at. */
for (;;) {
if (!*l)
return;
if (!streq(*l, path))
break;
l++;
}
vertical = strappenda(prefix, draw_special_char(DRAW_TREE_VERTICAL));
space = strappenda(prefix, draw_special_char(DRAW_TREE_SPACE));
for (;;) {
bool has_more = false;
if (!*l || !path_startswith(*l, path))
break;
n = l + 1;
for (;;) {
if (!*n || !path_startswith(*n, path))
break;
if (!path_startswith(*n, *l)) {
has_more = true;
break;
}
n++;
}
printf("%s%s%s\n", prefix, draw_special_char(has_more ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT), *l);
print_subtree(has_more ? vertical : space, *l, l);
l = n;
}
}
static void print_tree(const char *prefix, char **l) {
pager_open_if_enabled();
prefix = strempty(prefix);
if (arg_list) {
char **i;
STRV_FOREACH(i, l)
printf("%s%s\n", prefix, *i);
return;
}
if (strv_isempty(l)) {
printf("No objects discovered.\n");
return;
}
if (streq(l[0], "/") && !l[1]) {
printf("Only root object discovered.\n");
return;
}
print_subtree(prefix, "/", l);
}
static int on_path(const char *path, void *userdata) {
Set *paths = userdata;
int r;
assert(paths);
r = set_put_strdup(paths, path);
if (r < 0)
return log_oom();
return 0;
}
static int find_nodes(sd_bus *bus, const char *service, const char *path, Set *paths, bool many) {
static const XMLIntrospectOps ops = {
.on_path = on_path,
};
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
const char *xml;
int r;
r = sd_bus_call_method(bus, service, path, "org.freedesktop.DBus.Introspectable", "Introspect", &error, &reply, "");
if (r < 0) {
if (many)
printf("Failed to introspect object %s of service %s: %s\n", path, service, bus_error_message(&error, r));
else
log_error("Failed to introspect object %s of service %s: %s", path, service, bus_error_message(&error, r));
return r;
}
r = sd_bus_message_read(reply, "s", &xml);
if (r < 0)
return bus_log_parse_error(r);
return parse_xml_introspect(path, xml, &ops, paths);
}
static int tree_one(sd_bus *bus, const char *service, const char *prefix, bool many) {
_cleanup_set_free_free_ Set *paths = NULL, *done = NULL, *failed = NULL;
_cleanup_free_ char **l = NULL;
char *m;
int r;
paths = set_new(&string_hash_ops);
if (!paths)
return log_oom();
done = set_new(&string_hash_ops);
if (!done)
return log_oom();
failed = set_new(&string_hash_ops);
if (!failed)
return log_oom();
m = strdup("/");
if (!m)
return log_oom();
r = set_put(paths, m);
if (r < 0) {
free(m);
return log_oom();
}
for (;;) {
_cleanup_free_ char *p = NULL;
int q;
p = set_steal_first(paths);
if (!p)
break;
if (set_contains(done, p) ||
set_contains(failed, p))
continue;
q = find_nodes(bus, service, p, paths, many);
if (q < 0) {
if (r >= 0)
r = q;
q = set_put(failed, p);
} else
q = set_put(done, p);
if (q < 0)
return log_oom();
assert(q != 0);
p = NULL;
}
pager_open_if_enabled();
l = set_get_strv(done);
if (!l)
return log_oom();
strv_sort(l);
print_tree(prefix, l);
fflush(stdout);
return r;
}
static int tree(sd_bus *bus, char **argv) {
char **i;
int r = 0;
if (!arg_unique && !arg_acquired)
arg_acquired = true;
if (strv_length(argv) <= 1) {
_cleanup_strv_free_ char **names = NULL;
bool not_first = false;
r = sd_bus_list_names(bus, &names, NULL);
if (r < 0) {
log_error("Failed to get name list: %s", strerror(-r));
return r;
}
pager_open_if_enabled();
STRV_FOREACH(i, names) {
int q;
if (!arg_unique && (*i)[0] == ':')
continue;
if (!arg_acquired && (*i)[0] == ':')
continue;
if (not_first)
printf("\n");
printf("Service %s%s%s:\n", ansi_highlight(), *i, ansi_highlight_off());
q = tree_one(bus, *i, NULL, true);
if (q < 0 && r >= 0)
r = q;
not_first = true;
}
} else {
STRV_FOREACH(i, argv+1) {
int q;
if (i > argv+1)
printf("\n");
if (argv[2]) {
pager_open_if_enabled();
printf("Service %s%s%s:\n", ansi_highlight(), *i, ansi_highlight_off());
}
q = tree_one(bus, *i, NULL, !!argv[2]);
if (q < 0 && r >= 0)
r = q;
}
}
return r;
}
static int format_cmdline(sd_bus_message *m, FILE *f, bool needs_space) {
int r;
for (;;) {
const char *contents = NULL;
char type;
union {
uint8_t u8;
uint16_t u16;
int16_t s16;
uint32_t u32;
int32_t s32;
uint64_t u64;
int64_t s64;
double d64;
const char *string;
int i;
} basic;
r = sd_bus_message_peek_type(m, &type, &contents);
if (r <= 0)
return r;
if (bus_type_is_container(type) > 0) {
r = sd_bus_message_enter_container(m, type, contents);
if (r < 0)
return r;
if (type == SD_BUS_TYPE_ARRAY) {
unsigned n = 0;
/* count array entries */
for (;;) {
r = sd_bus_message_skip(m, contents);
if (r < 0)
return r;
if (r == 0)
break;
n++;
}
r = sd_bus_message_rewind(m, false);
if (r < 0)
return r;
if (needs_space)
fputc(' ', f);
fprintf(f, "%u", n);
} else if (type == SD_BUS_TYPE_VARIANT) {
if (needs_space)
fputc(' ', f);
fprintf(f, "%s", contents);
}
r = format_cmdline(m, f, true);
if (r < 0)
return r;
r = sd_bus_message_exit_container(m);
if (r < 0)
return r;
continue;
}
r = sd_bus_message_read_basic(m, type, &basic);
if (r < 0)
return r;
if (needs_space)
fputc(' ', f);
switch (type) {
case SD_BUS_TYPE_BYTE:
fprintf(f, "%u", basic.u8);
break;
case SD_BUS_TYPE_BOOLEAN:
fputs(true_false(basic.i), f);
break;
case SD_BUS_TYPE_INT16:
fprintf(f, "%i", basic.s16);
break;
case SD_BUS_TYPE_UINT16:
fprintf(f, "%u", basic.u16);
break;
case SD_BUS_TYPE_INT32:
fprintf(f, "%i", basic.s32);
break;
case SD_BUS_TYPE_UINT32:
fprintf(f, "%u", basic.u32);
break;
case SD_BUS_TYPE_INT64:
fprintf(f, "%" PRIi64, basic.s64);
break;
case SD_BUS_TYPE_UINT64:
fprintf(f, "%" PRIu64, basic.u64);
break;
case SD_BUS_TYPE_DOUBLE:
fprintf(f, "%g", basic.d64);
break;
case SD_BUS_TYPE_STRING:
case SD_BUS_TYPE_OBJECT_PATH:
case SD_BUS_TYPE_SIGNATURE: {
_cleanup_free_ char *b = NULL;
b = cescape(basic.string);
if (!b)
return -ENOMEM;
fprintf(f, "\"%s\"", b);
break;
}
case SD_BUS_TYPE_UNIX_FD:
fprintf(f, "%i", basic.i);
break;
default:
assert_not_reached("Unknown basic type.");
}
}
}
typedef struct Member {
const char *type;
char *interface;
char *name;
char *signature;
char *result;
char *value;
bool writable;
uint64_t flags;
} Member;
static unsigned long member_hash_func(const void *p, const uint8_t hash_key[]) {
const Member *m = p;
unsigned long ul;
assert(m);
assert(m->type);
ul = string_hash_func(m->type, hash_key);
if (m->name)
ul ^= string_hash_func(m->name, hash_key);
if (m->interface)
ul ^= string_hash_func(m->interface, hash_key);
return ul;
}
static int member_compare_func(const void *a, const void *b) {
const Member *x = a, *y = b;
int d;
assert(x);
assert(y);
assert(x->type);
assert(y->type);
if (!x->interface && y->interface)
return -1;
if (x->interface && !y->interface)
return 1;
if (x->interface && y->interface) {
d = strcmp(x->interface, y->interface);
if (d != 0)
return d;
}
d = strcmp(x->type, y->type);
if (d != 0)
return d;
if (!x->name && y->name)
return -1;
if (x->name && !y->name)
return 1;
if (x->name && y->name)
return strcmp(x->name, y->name);
return 0;
}
static int member_compare_funcp(const void *a, const void *b) {
const Member *const * x = (const Member *const *) a, * const *y = (const Member *const *) b;
return member_compare_func(*x, *y);
}
static void member_free(Member *m) {
if (!m)
return;
free(m->interface);
free(m->name);
free(m->signature);
free(m->result);
free(m->value);
free(m);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(Member*, member_free);
static void member_set_free(Set *s) {
Member *m;
while ((m = set_steal_first(s)))
member_free(m);
set_free(s);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(Set*, member_set_free);
static int on_interface(const char *interface, uint64_t flags, void *userdata) {
_cleanup_(member_freep) Member *m;
Set *members = userdata;
int r;
assert(interface);
assert(members);
m = new0(Member, 1);
if (!m)
return log_oom();
m->type = "interface";
m->flags = flags;
r = free_and_strdup(&m->interface, interface);
if (r < 0)
return log_oom();
r = set_put(members, m);
if (r <= 0) {
log_error("Duplicate interface");
return -EINVAL;
}
m = NULL;
return 0;
}
static int on_method(const char *interface, const char *name, const char *signature, const char *result, uint64_t flags, void *userdata) {
_cleanup_(member_freep) Member *m;
Set *members = userdata;
int r;
assert(interface);
assert(name);
m = new0(Member, 1);
if (!m)
return log_oom();
m->type = "method";
m->flags = flags;
r = free_and_strdup(&m->interface, interface);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->name, name);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->signature, signature);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->result, result);
if (r < 0)
return log_oom();
r = set_put(members, m);
if (r <= 0) {
log_error("Duplicate method");
return -EINVAL;
}
m = NULL;
return 0;
}
static int on_signal(const char *interface, const char *name, const char *signature, uint64_t flags, void *userdata) {
_cleanup_(member_freep) Member *m;
Set *members = userdata;
int r;
assert(interface);
assert(name);
m = new0(Member, 1);
if (!m)
return log_oom();
m->type = "signal";
m->flags = flags;
r = free_and_strdup(&m->interface, interface);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->name, name);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->signature, signature);
if (r < 0)
return log_oom();
r = set_put(members, m);
if (r <= 0) {
log_error("Duplicate signal");
return -EINVAL;
}
m = NULL;
return 0;
}
static int on_property(const char *interface, const char *name, const char *signature, bool writable, uint64_t flags, void *userdata) {
_cleanup_(member_freep) Member *m;
Set *members = userdata;
int r;
assert(interface);
assert(name);
m = new0(Member, 1);
if (!m)
return log_oom();
m->type = "property";
m->flags = flags;
m->writable = writable;
r = free_and_strdup(&m->interface, interface);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->name, name);
if (r < 0)
return log_oom();
r = free_and_strdup(&m->signature, signature);
if (r < 0)
return log_oom();
r = set_put(members, m);
if (r <= 0) {
log_error("Duplicate property");
return -EINVAL;
}
m = NULL;
return 0;
}
static const char *strdash(const char *x) {
return isempty(x) ? "-" : x;
}
static int introspect(sd_bus *bus, char **argv) {
static const struct hash_ops member_hash_ops = {
.hash = member_hash_func,
.compare = member_compare_func,
};
static const XMLIntrospectOps ops = {
.on_interface = on_interface,
.on_method = on_method,
.on_signal = on_signal,
.on_property = on_property,
};
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(member_set_freep) Set *members = NULL;
Iterator i;
Member *m;
const char *xml;
int r;
unsigned name_width, type_width, signature_width, result_width;
Member **sorted = NULL;
unsigned k = 0, j;
if (strv_length(argv) != 3) {
log_error("Requires service and object path argument.");
return -EINVAL;
}
members = set_new(&member_hash_ops);
if (!members)
return log_oom();
r = sd_bus_call_method(bus, argv[1], argv[2], "org.freedesktop.DBus.Introspectable", "Introspect", &error, &reply, "");
if (r < 0) {
log_error("Failed to introspect object %s of service %s: %s", argv[2], argv[1], bus_error_message(&error, r));
return r;
}
r = sd_bus_message_read(reply, "s", &xml);
if (r < 0)
return bus_log_parse_error(r);
/* First, get list of all properties */
r = parse_xml_introspect(argv[2], xml, &ops, members);
if (r < 0)
return r;
/* Second, find the current values for them */
SET_FOREACH(m, members, i) {
if (!streq(m->type, "property"))
continue;
if (m->value)
continue;
r = sd_bus_call_method(bus, argv[1], argv[2], "org.freedesktop.DBus.Properties", "GetAll", &error, &reply, "s", m->interface);
if (r < 0) {
log_error("%s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_enter_container(reply, 'a', "{sv}");
if (r < 0)
return bus_log_parse_error(r);
for (;;) {
Member *z;
_cleanup_free_ char *buf = NULL;
_cleanup_fclose_ FILE *mf = NULL;
size_t sz = 0;
const char *name;
r = sd_bus_message_enter_container(reply, 'e', "sv");
if (r < 0)
return bus_log_parse_error(r);
if (r == 0)
break;
r = sd_bus_message_read(reply, "s", &name);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_enter_container(reply, 'v', NULL);
if (r < 0)
return bus_log_parse_error(r);
mf = open_memstream(&buf, &sz);
if (!mf)
return log_oom();
r = format_cmdline(reply, mf, false);
if (r < 0)
return bus_log_parse_error(r);
fclose(mf);
mf = NULL;
z = set_get(members, &((Member) {
.type = "property",
.interface = m->interface,
.name = (char*) name }));
if (z) {
free(z->value);
z->value = buf;
buf = NULL;
}
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
}
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
}
pager_open_if_enabled();
name_width = strlen("NAME");
type_width = strlen("TYPE");
signature_width = strlen("SIGNATURE");
result_width = strlen("RESULT/VALUE");
sorted = newa(Member*, set_size(members));
SET_FOREACH(m, members, i) {
if (m->interface)
name_width = MAX(name_width, strlen(m->interface));
if (m->name)
name_width = MAX(name_width, strlen(m->name) + 1);
if (m->type)
type_width = MAX(type_width, strlen(m->type));
if (m->signature)
signature_width = MAX(signature_width, strlen(m->signature));
if (m->result)
result_width = MAX(result_width, strlen(m->result));
if (m->value)
result_width = MAX(result_width, strlen(m->value));
sorted[k++] = m;
}
if (result_width > 40)
result_width = 40;
assert(k == set_size(members));
qsort(sorted, k, sizeof(Member*), member_compare_funcp);
if (arg_legend) {
printf("%-*s %-*s %-*s %-*s %s\n",
(int) name_width, "NAME",
(int) type_width, "TYPE",
(int) signature_width, "SIGNATURE",
(int) result_width, "RESULT/VALUE",
"FLAGS");
}
for (j = 0; j < k; j++) {
_cleanup_free_ char *ellipsized = NULL;
const char *rv;
bool is_interface;
m = sorted[j];
is_interface = streq(m->type, "interface");
if (m->value) {
ellipsized = ellipsize(m->value, result_width, 100);
if (!ellipsized)
return log_oom();
rv = ellipsized;
} else
rv = strdash(m->result);
printf("%s%s%-*s%s %-*s %-*s %-*s%s%s%s%s%s%s\n",
is_interface ? ansi_highlight() : "",
is_interface ? "" : ".",
- !is_interface + (int) name_width, strdash(streq_ptr(m->type, "interface") ? m->interface : m->name),
is_interface ? ansi_highlight_off() : "",
(int) type_width, strdash(m->type),
(int) signature_width, strdash(m->signature),
(int) result_width, rv,
(m->flags & SD_BUS_VTABLE_DEPRECATED) ? " deprecated" : (m->flags || m->writable ? "" : " -"),
(m->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) ? " no-reply" : "",
(m->flags & SD_BUS_VTABLE_PROPERTY_CONST) ? " const" : "",
(m->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) ? " emits-change" : "",
(m->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) ? " emits-invalidation" : "",
m->writable ? " writable" : "");
}
return 0;
}
static int message_dump(sd_bus_message *m, FILE *f) {
return bus_message_dump(m, f, BUS_MESSAGE_DUMP_WITH_HEADER);
}
static int message_pcap(sd_bus_message *m, FILE *f) {
return bus_message_pcap_frame(m, arg_snaplen, f);
}
static int monitor(sd_bus *bus, char *argv[], int (*dump)(sd_bus_message *m, FILE *f)) {
bool added_something = false;
char **i;
int r;
STRV_FOREACH(i, argv+1) {
_cleanup_free_ char *m = NULL;
if (!service_name_is_valid(*i)) {
log_error("Invalid service name '%s'", *i);
return -EINVAL;
}
m = strjoin("sender='", *i, "'", NULL);
if (!m)
return log_oom();
r = sd_bus_add_match(bus, NULL, m, NULL, NULL);
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
added_something = true;
}
STRV_FOREACH(i, arg_matches) {
r = sd_bus_add_match(bus, NULL, *i, NULL, NULL);
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
added_something = true;
}
if (!added_something) {
r = sd_bus_add_match(bus, NULL, "", NULL, NULL);
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
}
for (;;) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
r = sd_bus_process(bus, &m);
if (r < 0) {
log_error("Failed to process bus: %s", strerror(-r));
return r;
}
if (m) {
dump(m, stdout);
continue;
}
if (r > 0)
continue;
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
log_error("Failed to wait for bus: %s", strerror(-r));
return r;
}
}
}
static int capture(sd_bus *bus, char *argv[]) {
int r;
if (isatty(fileno(stdout)) > 0) {
log_error("Refusing to write message data to console, please redirect output to a file.");
return -EINVAL;
}
bus_pcap_header(arg_snaplen, stdout);
r = monitor(bus, argv, message_pcap);
if (r < 0)
return r;
if (ferror(stdout)) {
log_error("Couldn't write capture file.");
return -EIO;
}
return r;
}
static int status(sd_bus *bus, char *argv[]) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
pid_t pid;
int r;
assert(bus);
if (strv_length(argv) > 2) {
log_error("Expects no or one argument.");
return -EINVAL;
}
if (argv[1]) {
r = parse_pid(argv[1], &pid);
if (r < 0)
r = sd_bus_get_name_creds(
bus,
argv[1],
(arg_augment_creds ? SD_BUS_CREDS_AUGMENT : 0) | _SD_BUS_CREDS_ALL,
&creds);
else
r = sd_bus_creds_new_from_pid(
&creds,
pid,
_SD_BUS_CREDS_ALL);
} else
r = sd_bus_get_owner_creds(
bus,
(arg_augment_creds ? SD_BUS_CREDS_AUGMENT : 0) | _SD_BUS_CREDS_ALL,
&creds);
if (r < 0) {
log_error("Failed to get credentials: %s", strerror(-r));
return r;
}
bus_creds_dump(creds, NULL, false);
return 0;
}
static int message_append_cmdline(sd_bus_message *m, const char *signature, char ***x) {
char **p;
int r;
assert(m);
assert(signature);
assert(x);
p = *x;
for (;;) {
const char *v;
char t;
t = *signature;
v = *p;
if (t == 0)
break;
if (!v) {
log_error("Too few parameters for signature.");
return -EINVAL;
}
signature++;
p++;
switch (t) {
case SD_BUS_TYPE_BOOLEAN:
r = parse_boolean(v);
if (r < 0) {
log_error("Failed to parse as boolean: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &r);
break;
case SD_BUS_TYPE_BYTE: {
uint8_t z;
r = safe_atou8(v, &z);
if (r < 0) {
log_error("Failed to parse as byte (unsigned 8bit integer): %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_INT16: {
int16_t z;
r = safe_atoi16(v, &z);
if (r < 0) {
log_error("Failed to parse as signed 16bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_UINT16: {
uint16_t z;
r = safe_atou16(v, &z);
if (r < 0) {
log_error("Failed to parse as unsigned 16bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_INT32: {
int32_t z;
r = safe_atoi32(v, &z);
if (r < 0) {
log_error("Failed to parse as signed 32bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_UINT32: {
uint32_t z;
r = safe_atou32(v, &z);
if (r < 0) {
log_error("Failed to parse as unsigned 32bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_INT64: {
int64_t z;
r = safe_atoi64(v, &z);
if (r < 0) {
log_error("Failed to parse as signed 64bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_UINT64: {
uint64_t z;
r = safe_atou64(v, &z);
if (r < 0) {
log_error("Failed to parse as unsigned 64bit integer: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_DOUBLE: {
double z;
r = safe_atod(v, &z);
if (r < 0) {
log_error("Failed to parse as double precision floating point: %s", v);
return r;
}
r = sd_bus_message_append_basic(m, t, &z);
break;
}
case SD_BUS_TYPE_STRING:
case SD_BUS_TYPE_OBJECT_PATH:
case SD_BUS_TYPE_SIGNATURE:
r = sd_bus_message_append_basic(m, t, v);
break;
case SD_BUS_TYPE_ARRAY: {
uint32_t n;
size_t k;
r = safe_atou32(v, &n);
if (r < 0) {
log_error("Failed to parse number of array entries: %s", v);
return r;
}
r = signature_element_length(signature, &k);
if (r < 0) {
log_error("Invalid array signature.");
return r;
}
{
unsigned i;
char s[k + 1];
memcpy(s, signature, k);
s[k] = 0;
r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, s);
if (r < 0)
return bus_log_create_error(r);
for (i = 0; i < n; i++) {
r = message_append_cmdline(m, s, &p);
if (r < 0)
return r;
}
}
signature += k;
r = sd_bus_message_close_container(m);
break;
}
case SD_BUS_TYPE_VARIANT:
r = sd_bus_message_open_container(m, SD_BUS_TYPE_VARIANT, v);
if (r < 0)
return bus_log_create_error(r);
r = message_append_cmdline(m, v, &p);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
break;
case SD_BUS_TYPE_STRUCT_BEGIN:
case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
size_t k;
signature--;
p--;
r = signature_element_length(signature, &k);
if (r < 0) {
log_error("Invalid struct/dict entry signature.");
return r;
}
{
char s[k-1];
memcpy(s, signature + 1, k - 2);
s[k - 2] = 0;
r = sd_bus_message_open_container(m, t == SD_BUS_TYPE_STRUCT_BEGIN ? SD_BUS_TYPE_STRUCT : SD_BUS_TYPE_DICT_ENTRY, s);
if (r < 0)
return bus_log_create_error(r);
r = message_append_cmdline(m, s, &p);
if (r < 0)
return r;
}
signature += k;
r = sd_bus_message_close_container(m);
break;
}
case SD_BUS_TYPE_UNIX_FD:
log_error("UNIX file descriptor not supported as type.");
return -EINVAL;
default:
log_error("Unknown signature type %c.", t);
return -EINVAL;
}
if (r < 0)
return bus_log_create_error(r);
}
*x = p;
return 0;
}
static int call(sd_bus *bus, char *argv[]) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
int r;
assert(bus);
if (strv_length(argv) < 5) {
log_error("Expects at least four arguments.");
return -EINVAL;
}
r = sd_bus_message_new_method_call(bus, &m, argv[1], argv[2], argv[3], argv[4]);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_set_expect_reply(m, arg_expect_reply);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_set_auto_start(m, arg_auto_start);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_set_allow_interactive_authorization(m, arg_allow_interactive_authorization);
if (r < 0)
return bus_log_create_error(r);
if (!isempty(argv[5])) {
char **p;
p = argv+6;
r = message_append_cmdline(m, argv[5], &p);
if (r < 0)
return r;
if (*p) {
log_error("Too many parameters for signature.");
return -EINVAL;
}
}
if (!arg_expect_reply) {
r = sd_bus_send(bus, m, NULL);
if (r < 0) {
log_error("Failed to send message.");
return r;
}
return 0;
}
r = sd_bus_call(bus, m, arg_timeout, &error, &reply);
if (r < 0) {
log_error("%s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_is_empty(reply);
if (r < 0)
return bus_log_parse_error(r);
if (r == 0 && !arg_quiet) {
if (arg_verbose) {
pager_open_if_enabled();
r = bus_message_dump(reply, stdout, 0);
if (r < 0)
return r;
} else {
fputs(sd_bus_message_get_signature(reply, true), stdout);
fputc(' ', stdout);
r = format_cmdline(reply, stdout, false);
if (r < 0)
return bus_log_parse_error(r);
fputc('\n', stdout);
}
}
return 0;
}
static int get_property(sd_bus *bus, char *argv[]) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
unsigned n;
char **i;
int r;
assert(bus);
n = strv_length(argv);
if (n < 5) {
log_error("Expects at least four arguments.");
return -EINVAL;
}
STRV_FOREACH(i, argv + 4) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
const char *contents = NULL;
char type;
r = sd_bus_call_method(bus, argv[1], argv[2], "org.freedesktop.DBus.Properties", "Get", &error, &reply, "ss", argv[3], *i);
if (r < 0) {
log_error("%s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_peek_type(reply, &type, &contents);
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_enter_container(reply, 'v', contents);
if (r < 0)
return bus_log_parse_error(r);
if (arg_verbose) {
pager_open_if_enabled();
r = bus_message_dump(reply, stdout, BUS_MESSAGE_DUMP_SUBTREE_ONLY);
if (r < 0)
return r;
} else {
fputs(contents, stdout);
fputc(' ', stdout);
r = format_cmdline(reply, stdout, false);
if (r < 0)
return bus_log_parse_error(r);
fputc('\n', stdout);
}
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
}
return 0;
}
static int set_property(sd_bus *bus, char *argv[]) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
unsigned n;
char **p;
int r;
assert(bus);
n = strv_length(argv);
if (n < 6) {
log_error("Expects at least five arguments.");
return -EINVAL;
}
r = sd_bus_message_new_method_call(bus, &m, argv[1], argv[2], "org.freedesktop.DBus.Properties", "Set");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "ss", argv[3], argv[4]);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'v', argv[5]);
if (r < 0)
return bus_log_create_error(r);
p = argv+6;
r = message_append_cmdline(m, argv[5], &p);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
if (*p) {
log_error("Too many parameters for signature.");
return -EINVAL;
}
r = sd_bus_call(bus, m, arg_timeout, &error, NULL);
if (r < 0) {
log_error("%s", bus_error_message(&error, r));
return r;
}
return 0;
}
static int help(void) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Introspect the bus.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" --no-legend Do not show the headers and footers\n"
" --system Connect to system bus\n"
" --user Connect to user bus\n"
" -H --host=[USER@]HOST Operate on remote host\n"
" -M --machine=CONTAINER Operate on local container\n"
" --address=ADDRESS Connect to bus specified by address\n"
" --show-machine Show machine ID column in list\n"
" --unique Only show unique names\n"
" --acquired Only show acquired names\n"
" --activatable Only show activatable names\n"
" --match=MATCH Only show matching messages\n"
" --list Don't show tree, but simple object path list\n"
" --quiet Don't show method call reply\n"
" --verbose Show result values in long format\n"
" --expect-reply=BOOL Expect a method call reply\n"
" --auto-start=BOOL Auto-start destination service\n"
" --allow-interactive-authorization=BOOL\n"
" Allow interactive authorization for operation\n"
" --timeout=SECS Maximum time to wait for method call completion\n"
" --augment-creds=BOOL Extend credential data with data read from /proc/$PID\n\n"
"Commands:\n"
" list List bus names\n"
" status [SERVICE] Show bus service, process or bus owner credentials\n"
" monitor [SERVICE...] Show bus traffic\n"
" capture [SERVICE...] Capture bus traffic as pcap\n"
" tree [SERVICE...] Show object tree of service\n"
" introspect SERVICE OBJECT\n"
" call SERVICE OBJECT INTERFACE METHOD [SIGNATURE [ARGUMENT...]]\n"
" Call a method\n"
" get-property SERVICE OBJECT INTERFACE PROPERTY...\n"
" Get property value\n"
" set-property SERVICE OBJECT INTERFACE PROPERTY SIGNATURE ARGUMENT...\n"
" Set property value\n"
" help Show this help\n"
, program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_NO_PAGER,
ARG_NO_LEGEND,
ARG_SYSTEM,
ARG_USER,
ARG_ADDRESS,
ARG_MATCH,
ARG_SHOW_MACHINE,
ARG_UNIQUE,
ARG_ACQUIRED,
ARG_ACTIVATABLE,
ARG_SIZE,
ARG_LIST,
ARG_VERBOSE,
ARG_EXPECT_REPLY,
ARG_AUTO_START,
ARG_ALLOW_INTERACTIVE_AUTHORIZATION,
ARG_TIMEOUT,
ARG_AUGMENT_CREDS,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "user", no_argument, NULL, ARG_USER },
{ "address", required_argument, NULL, ARG_ADDRESS },
{ "show-machine", no_argument, NULL, ARG_SHOW_MACHINE },
{ "unique", no_argument, NULL, ARG_UNIQUE },
{ "acquired", no_argument, NULL, ARG_ACQUIRED },
{ "activatable", no_argument, NULL, ARG_ACTIVATABLE },
{ "match", required_argument, NULL, ARG_MATCH },
{ "host", required_argument, NULL, 'H' },
{ "machine", required_argument, NULL, 'M' },
{ "size", required_argument, NULL, ARG_SIZE },
{ "list", no_argument, NULL, ARG_LIST },
{ "quiet", no_argument, NULL, 'q' },
{ "verbose", no_argument, NULL, ARG_VERBOSE },
{ "expect-reply", required_argument, NULL, ARG_EXPECT_REPLY },
{ "auto-start", required_argument, NULL, ARG_AUTO_START },
{ "allow-interactive-authorization", required_argument, NULL, ARG_ALLOW_INTERACTIVE_AUTHORIZATION },
{ "timeout", required_argument, NULL, ARG_TIMEOUT },
{ "augment-creds",required_argument, NULL, ARG_AUGMENT_CREDS},
{},
};
int c, r;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hH:M:q", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
case ARG_NO_PAGER:
arg_no_pager = true;
break;
case ARG_NO_LEGEND:
arg_legend = false;
break;
case ARG_USER:
arg_user = true;
break;
case ARG_SYSTEM:
arg_user = false;
break;
case ARG_ADDRESS:
arg_address = optarg;
break;
case ARG_SHOW_MACHINE:
arg_show_machine = true;
break;
case ARG_UNIQUE:
arg_unique = true;
break;
case ARG_ACQUIRED:
arg_acquired = true;
break;
case ARG_ACTIVATABLE:
arg_activatable = true;
break;
case ARG_MATCH:
if (strv_extend(&arg_matches, optarg) < 0)
return log_oom();
break;
case ARG_SIZE: {
off_t o;
r = parse_size(optarg, 0, &o);
if (r < 0) {
log_error("Failed to parse size: %s", optarg);
return r;
}
if ((off_t) (size_t) o != o) {
log_error("Size out of range.");
return -E2BIG;
}
arg_snaplen = (size_t) o;
break;
}
case ARG_LIST:
arg_list = true;
break;
case 'H':
arg_transport = BUS_TRANSPORT_REMOTE;
arg_host = optarg;
break;
case 'M':
arg_transport = BUS_TRANSPORT_CONTAINER;
arg_host = optarg;
break;
case 'q':
arg_quiet = true;
break;
case ARG_VERBOSE:
arg_verbose = true;
break;
case ARG_EXPECT_REPLY:
r = parse_boolean(optarg);
if (r < 0) {
log_error("Failed to parse --expect-reply= parameter.");
return r;
}
arg_expect_reply = !!r;
break;
case ARG_AUTO_START:
r = parse_boolean(optarg);
if (r < 0) {
log_error("Failed to parse --auto-start= parameter.");
return r;
}
arg_auto_start = !!r;
break;
case ARG_ALLOW_INTERACTIVE_AUTHORIZATION:
r = parse_boolean(optarg);
if (r < 0) {
log_error("Failed to parse --allow-interactive-authorization= parameter.");
return r;
}
arg_allow_interactive_authorization = !!r;
break;
case ARG_TIMEOUT:
r = parse_sec(optarg, &arg_timeout);
if (r < 0) {
log_error("Failed to parse --timeout= parameter.");
return r;
}
break;
case ARG_AUGMENT_CREDS:
r = parse_boolean(optarg);
if (r < 0) {
log_error("Failed to parse --augment-creds= parameter.");
return r;
}
arg_augment_creds = !!r;
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
return 1;
}
static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
assert(bus);
if (optind >= argc ||
streq(argv[optind], "list"))
return list_bus_names(bus, argv + optind);
if (streq(argv[optind], "monitor"))
return monitor(bus, argv + optind, message_dump);
if (streq(argv[optind], "capture"))
return capture(bus, argv + optind);
if (streq(argv[optind], "status"))
return status(bus, argv + optind);
if (streq(argv[optind], "tree"))
return tree(bus, argv + optind);
if (streq(argv[optind], "introspect"))
return introspect(bus, argv + optind);
if (streq(argv[optind], "call"))
return call(bus, argv + optind);
if (streq(argv[optind], "get-property"))
return get_property(bus, argv + optind);
if (streq(argv[optind], "set-property"))
return set_property(bus, argv + optind);
if (streq(argv[optind], "help"))
return help();
log_error("Unknown command '%s'", argv[optind]);
return -EINVAL;
}
int main(int argc, char *argv[]) {
_cleanup_bus_close_unref_ sd_bus *bus = NULL;
int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
r = sd_bus_new(&bus);
if (r < 0) {
log_error("Failed to allocate bus: %s", strerror(-r));
goto finish;
}
if (streq_ptr(argv[optind], "monitor") ||
streq_ptr(argv[optind], "capture")) {
r = sd_bus_set_monitor(bus, true);
if (r < 0) {
log_error("Failed to set monitor mode: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_creds(bus, true, _SD_BUS_CREDS_ALL);
if (r < 0) {
log_error("Failed to enable credentials: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_timestamp(bus, true);
if (r < 0) {
log_error("Failed to enable timestamps: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_fds(bus, true);
if (r < 0) {
log_error("Failed to enable fds: %s", strerror(-r));
goto finish;
}
}
if (arg_address)
r = sd_bus_set_address(bus, arg_address);
else {
r = sd_bus_set_bus_client(bus, true);
if (r < 0) {
log_error("Failed to set bus client: %s", strerror(-r));
goto finish;
}
switch (arg_transport) {
case BUS_TRANSPORT_LOCAL:
if (arg_user)
r = bus_set_address_user(bus);
else
r = bus_set_address_system(bus);
break;
case BUS_TRANSPORT_REMOTE:
r = bus_set_address_system_remote(bus, arg_host);
break;
case BUS_TRANSPORT_CONTAINER:
r = bus_set_address_system_container(bus, arg_host);
break;
default:
assert_not_reached("Hmm, unknown transport type.");
}
}
if (r < 0) {
log_error("Failed to set address: %s", strerror(-r));
goto finish;
}
r = sd_bus_start(bus);
if (r < 0) {
log_error("Failed to connect to bus: %s", strerror(-r));
goto finish;
}
r = busctl_main(bus, argc, argv);
finish:
pager_close();
strv_free(arg_matches);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}